Lesnov, A. E., L. V. Pustovik, and I. A. Sarana. “EXTRACTION OF METAL IONS BY 4-BENZOYL- OR 4-(3-NYTROBENZOYL-1-HEXYL- 3-METHYL-2-PYRAZOLINE-5-ONES”. ChemChemTech, Vol. 63, no. 9, Aug. 2020, pp. 63-69, doi:10.6060/ivkkt.20206309.6216.